| This article has been：Browse 1768Times Download 1198Times |
scan it! |
|
|
| DOI：10.13522/j.cnki.ggps.20190099 |
|
| Comparative Experimental Study on Application Performance of Wing Pillar-shaped Measuring Flume in Three Common Channels |
|
LIU Hongtao, NIU Yan,YU Mingzhou, SONG Yimeng, ZHAO Ruijuan, HAN Yu, QU Zhongyi
|
|
1. College of Water and Environmental Engineering, Changchun Institute of Technology, Changchun 130012, China; 2.Water Conservancy and Civil Engineering College, Inner Mongolia Agricultural University, Hohhot 010018, China;3.Laboratory of Applied Disaster Prevention in Water Conservation Engineering of Jilin Province, Changchun 130012, China;4. Changchun Water Resources Survey and Design Institute, Changchun 130012, China; 5. Songliao Water Resources Commission, Changchun 130012, China; 6.College of Water Resources & Civil Engineering, China Agricultural University, Beijing 100083, China
|
| Abstract: |
| Wing pillar-shaped measuring flume is a new type of measuring flume in irrigation area, which has the characteristics of low cost, easy construction and high accuracy. 【Objective】 We aimed to explore the application scope of wing pillar-shaped measuring flumein rectangular channel, trapezoidal channel and U-shaped channel, this paper conducted comparative experimental study on its application performance through experiments.【Method】 Three shrinkage ratios of the flume were designed on three type channels and the data were tested under different flow conditions. And the accuracy of water measurement, Froude number, head loss and backwater height were compared and analyzed.【Result】 The flow formulas of the flume with different shrinkage ratios in different types of channels were fitted. The average relative error were 0.42%, 1.34%, 1.65% and they were all meet the Specifications for water measurement of irrigation canal system (GB/T 21303—2017). The Froude number of the wing pillar-shaped measuring flume in three channels were all less than 0.4 and the submergence degree of the flume were all greater than 0.85. The maximum critical submergence degree of the flume in U-shaped channel was the highest, and the head loss of wing pillar-shaped measuring flume in rectangular channel accounted for the lowest percentage of the total head in the upstream. 【Conclusion】 The test results showed that the flume can be used for water-saving continuation in irrigation area. And under the same channel slope, it works best to build the wing pillar-shaped measuring flume between the connecting position of rectangular channel and U-shaped channel. |
| Key words: wing pillar-shaped measuring flume; flow formula; accuracy of flow measurement; contrast test |
|
|
